Multiple compartment plastic packing

Abstract

A plastic packing device for the storage and the delivery of active materials consisting of multiple compartments destined to accommodate liquid, solid or gel materials, the compartments being formed by the joinder of two flexible polymeric sheets and comprising at least a sealed storage compartment impervious to the active materials and a sealed receiving compartment. At least one of the seams of the storage compartment is constituted by a system consisting of an internal layer of foam type plastic sheet which adheres on both its outer surfaces to leak-tight resilient polymeric sheets. External pressure on one of the compartments provokes internal rupture of the foam layer without rupture of outer polymeric sheets thus enabling emptying of storage compartment into receiving compartment without exposure of the active substance to the surrounding environment. The plastic packing is specially useful for ready premix of different components of useful active mixtures immediately before use. Utility is also apparent as easy-to-handle devices for the delivery of insecticides, malodor-counteractants or air-fresheners.

What I claim is: 
     
       1. A plastic packing for the storage and the delivery of active materials containing multiple compartments to accomodate liquid, solid or gel materials, said compartments being formed by the joinder of two flexible sheets of polymeric plastic materials, which packing is characterized in that it comprises: at least one sealed storage compartment impervious to the active materials, and   a sealed receiving compartment, said storage compartment being limited at its periphery by seams, at least one of which being constituted by a sheet of rupturable polymer plastic foam material which adheres on both its outer surfaces to leak-tight resilient polymeric plastic sheets, said seam rupturing internally within the foam material without rupture of the outer walls of the storage compartment when an external pressure is applied to one of the compartments to tear open said storage compartment and permit emptying of said active material into said receiving compartment without exposure of said material to the surrounding environment.   
     
     
       2. A plastic packing according to claim 1, wherein the sealed receiving compartment is characterized by having at least one wall constituted by a polymeric sheet pervious to the useful active material so as to enable the diffusion of the vapours thereof into the surrounding environment. 
     
     
       3. A two compartment plastic packing in accordance with claim 1, wherein the storage compartment is housed within the receiving compartment and the opening of the said storage compartment is effected by applying an external pressure on the walls of the said receiving compartment. 
     
     
       4. A plastic packing in accordance with claim 1, wherein the sheet of polymer plastic foam material is selected from polyethylene, polypropylene, polyamide, polyvinyl chloride, polyester, or polystyrene foam and has a thickness of between about 0.005 and 0.2 mm.